[torqueusers] maui + torque job start rate

Ling C. Ho ling at fnal.gov
Thu Apr 9 10:09:31 MDT 2009


Hi Tom,

In your patch, you have commented out both MPBSJobModify calls before and after pbs_asystart(). I 
can understand the first MPBSJobStart() which set the node where the job should run. What is the 
purpose of the second MPBSJobStart as it set the neednodes to 1?

Thanks,
...
ling

Tom Rudwick wrote:

> If you search the maui list archives for my asynchronous job start patch
> you can increase that speed greatly.
> 
> Tom
> 
> 
> Stijn De Weirdt wrote:
>> hi all,
>>
>> (this is a crosspost to both maui and torque users list)
>>
>> we are having issues with the job start rate using maui+torque. starting
>> a job takes on average 2 seconds, which is slow for what our users are
>> dumping in our queues.
>>
>> with a job start i mean the following cycle
>> 04/01 10:01:08 MRMJobStart(374900,Msg,SC)
>> 04/01 10:01:08 MPBSJobStart(374900,gengar,Msg,SC)
>> 04/01 10:01:08
>> MPBSJobModify(374900,Resource_List,Resource,node088.gengar.gent.vsc)
>> 04/01 10:01:10 MPBSJobModify(374900,Resource_List,Resource,1)
>> 04/01 10:01:10 INFO:     job '374900' successfully started
>> 04/01 10:01:10 INFO:     command sent to server
>> 04/01 10:01:10 INFO:     response received from server
>>
>> i've already tried to follow the "large cluster" tuning tips to see if
>> it helps, but no real result. (the only tip that might solve the
>> problemn is the asyncstart option from moab ;). (we have a 200 node, 8
>> core/node cluster (i actually don't think this is "large"))
>>
>> anyway, before i dig in the code looking for options, i'm wondering what
>> other people are seeing as minimal start time, so i know if it is
>> possible at all.
>>
>> many thanks,
>>
>> stijn
>>   
> 
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